1# SPDX-License-Identifier: GPL-2.0 2config PPC32 3 bool 4 default y if !PPC64 5 6config PPC64 7 bool "64-bit kernel" 8 select ZLIB_DEFLATE 9 help 10 This option selects whether a 32-bit or a 64-bit kernel 11 will be built. 12 13menu "Processor support" 14choice 15 prompt "Processor Type" 16 depends on PPC32 17 help 18 There are five families of 32 bit PowerPC chips supported. 19 The most common ones are the desktop and server CPUs (603, 20 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their 21 embedded 512x/52xx/82xx/83xx/86xx counterparts. 22 The other embedded parts, namely 4xx, 8xx and e500 23 (85xx) each form a family of their own that is not compatible 24 with the others. 25 26 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx. 27 28config PPC_BOOK3S_32 29 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" 30 imply PPC_FPU 31 select PPC_HAVE_PMU_SUPPORT 32 select HAVE_ARCH_VMAP_STACK 33 34config PPC_85xx 35 bool "Freescale 85xx" 36 select PPC_E500 37 38config PPC_8xx 39 bool "Freescale 8xx" 40 select ARCH_SUPPORTS_HUGETLBFS 41 select FSL_SOC 42 select PPC_KUEP 43 select HAVE_ARCH_VMAP_STACK 44 select HUGETLBFS 45 46config 44x 47 bool "AMCC 44x, 46x or 47x" 48 select PPC_DCR_NATIVE 49 select PPC_UDBG_16550 50 select HAVE_PCI 51 select PHYS_64BIT 52 select PPC_KUEP 53 54endchoice 55 56config PPC_BOOK3S_603 57 bool "Support for 603 SW loaded TLB" 58 depends on PPC_BOOK3S_32 59 default y 60 help 61 Provide support for processors based on the 603 cores. Those 62 processors don't have a HASH MMU and provide SW TLB loading. 63 64config PPC_BOOK3S_604 65 bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603 66 depends on PPC_BOOK3S_32 67 default y 68 help 69 Provide support for processors not based on the 603 cores. 70 Those processors have a HASH MMU. 71 72choice 73 prompt "Processor Type" 74 depends on PPC64 75 help 76 There are two families of 64 bit PowerPC chips supported. 77 The most common ones are the desktop and server CPUs 78 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...) 79 80 The other are the "embedded" processors compliant with the 81 "Book 3E" variant of the architecture 82 83config PPC_BOOK3S_64 84 bool "Server processors" 85 select PPC_FPU 86 select PPC_HAVE_PMU_SUPPORT 87 select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION 88 select ARCH_ENABLE_SPLIT_PMD_PTLOCK 89 select ARCH_SUPPORTS_HUGETLBFS 90 select ARCH_SUPPORTS_NUMA_BALANCING 91 select HAVE_MOVE_PMD 92 select HAVE_MOVE_PUD 93 select IRQ_WORK 94 select PPC_64S_HASH_MMU if !PPC_RADIX_MMU 95 select KASAN_VMALLOC if KASAN 96 97config PPC_BOOK3E_64 98 bool "Embedded processors" 99 select PPC_E500 100 select PPC_E500MC 101 select PPC_FPU # Make it a choice ? 102 select PPC_SMP_MUXED_IPI 103 select PPC_DOORBELL 104 select ZONE_DMA 105 106endchoice 107 108config PPC_THP 109 def_bool y 110 depends on PPC_BOOK3S_64 111 depends on PPC_RADIX_MMU || (PPC_64S_HASH_MMU && PAGE_SIZE_64KB) 112 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 113 select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD 114 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE 115 116choice 117 prompt "CPU selection" 118 help 119 This will create a kernel which is optimised for a particular CPU. 120 The resulting kernel may not run on other CPUs, so use this with care. 121 122 If unsure, select Generic. 123 124config POWERPC64_CPU 125 bool "Generic (POWER5 and PowerPC 970 and above)" 126 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN 127 select PPC_64S_HASH_MMU 128 129config POWERPC64_CPU 130 bool "Generic (POWER8 and above)" 131 depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN 132 select ARCH_HAS_FAST_MULTIPLIER 133 select PPC_64S_HASH_MMU 134 select PPC_HAS_LBARX_LHARX 135 136config POWERPC_CPU 137 bool "Generic 32 bits powerpc" 138 depends on PPC_BOOK3S_32 139 140config CELL_CPU 141 bool "Cell Broadband Engine" 142 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN 143 depends on !CC_IS_CLANG 144 select PPC_64S_HASH_MMU 145 146config PPC_970_CPU 147 bool "PowerPC 970 (including PowerPC G5)" 148 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN 149 select PPC_64S_HASH_MMU 150 151config POWER6_CPU 152 bool "POWER6" 153 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN 154 select PPC_64S_HASH_MMU 155 156config POWER7_CPU 157 bool "POWER7" 158 depends on PPC_BOOK3S_64 159 select ARCH_HAS_FAST_MULTIPLIER 160 select PPC_64S_HASH_MMU 161 select PPC_HAS_LBARX_LHARX 162 163config POWER8_CPU 164 bool "POWER8" 165 depends on PPC_BOOK3S_64 166 select ARCH_HAS_FAST_MULTIPLIER 167 select PPC_64S_HASH_MMU 168 select PPC_HAS_LBARX_LHARX 169 170config POWER9_CPU 171 bool "POWER9" 172 depends on PPC_BOOK3S_64 173 select ARCH_HAS_FAST_MULTIPLIER 174 select PPC_HAS_LBARX_LHARX 175 176config POWER10_CPU 177 bool "POWER10" 178 depends on PPC_BOOK3S_64 179 select ARCH_HAS_FAST_MULTIPLIER 180 select PPC_HAVE_PREFIXED_SUPPORT 181 select PPC_HAVE_PCREL_SUPPORT 182 183config E5500_CPU 184 bool "Freescale e5500" 185 depends on PPC64 && PPC_E500 186 187config E6500_CPU 188 bool "Freescale e6500" 189 depends on PPC64 && PPC_E500 190 depends on !CC_IS_CLANG 191 select PPC_HAS_LBARX_LHARX 192 193config 440_CPU 194 bool "440 (44x family)" 195 depends on 44x 196 197config 464_CPU 198 bool "464 (44x family)" 199 depends on 44x 200 depends on !CC_IS_CLANG 201 202config 476_CPU 203 bool "476 (47x family)" 204 depends on PPC_47x 205 depends on !CC_IS_CLANG 206 207config 860_CPU 208 bool "8xx family" 209 depends on PPC_8xx 210 depends on !CC_IS_CLANG 211 212config E300C2_CPU 213 bool "e300c2 (832x)" 214 depends on PPC_BOOK3S_32 215 depends on !CC_IS_CLANG 216 217config E300C3_CPU 218 bool "e300c3 (831x)" 219 depends on PPC_BOOK3S_32 220 depends on !CC_IS_CLANG 221 222config G4_CPU 223 bool "G4 (74xx)" 224 depends on PPC_BOOK3S_32 225 select ALTIVEC 226 227config E500_CPU 228 bool "e500 (8540)" 229 depends on PPC_85xx && !PPC_E500MC 230 231config E500MC_CPU 232 bool "e500mc" 233 depends on PPC_85xx && PPC_E500MC 234 235config TOOLCHAIN_DEFAULT_CPU 236 bool "Rely on the toolchain's implicit default CPU" 237 238endchoice 239 240config TARGET_CPU_BOOL 241 bool 242 default !TOOLCHAIN_DEFAULT_CPU 243 244config TARGET_CPU 245 string 246 depends on TARGET_CPU_BOOL 247 default "cell" if CELL_CPU 248 default "970" if PPC_970_CPU 249 default "power6" if POWER6_CPU 250 default "power7" if POWER7_CPU 251 default "power8" if POWER8_CPU 252 default "power9" if POWER9_CPU 253 default "power10" if POWER10_CPU 254 default "e5500" if E5500_CPU 255 default "e6500" if E6500_CPU 256 default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN 257 default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN 258 default "440" if 440_CPU 259 default "464" if 464_CPU 260 default "476" if 476_CPU 261 default "860" if 860_CPU 262 default "e300c2" if E300C2_CPU 263 default "e300c3" if E300C3_CPU 264 default "G4" if G4_CPU 265 default "8540" if E500_CPU 266 default "e500mc" if E500MC_CPU 267 default "powerpc" if POWERPC_CPU 268 269config TUNE_CPU 270 string 271 depends on POWERPC64_CPU 272 default "-mtune=power10" if $(cc-option,-mtune=power10) 273 default "-mtune=power9" if $(cc-option,-mtune=power9) 274 default "-mtune=power8" if $(cc-option,-mtune=power8) 275 276config PPC_BOOK3S 277 def_bool y 278 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 279 280config PPC_E500 281 select FSL_EMB_PERFMON 282 bool 283 select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64 284 select PPC_SMP_MUXED_IPI 285 select PPC_DOORBELL 286 select PPC_KUEP 287 288config PPC_E500MC 289 bool "e500mc Support" 290 select PPC_FPU 291 select COMMON_CLK 292 depends on PPC_E500 293 help 294 This must be enabled for running on e500mc (and derivatives 295 such as e5500/e6500), and must be disabled for running on 296 e500v1 or e500v2. 297 298config PPC_FPU_REGS 299 bool 300 301config PPC_FPU 302 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x 303 default y if PPC64 304 select PPC_FPU_REGS 305 help 306 This must be enabled to support the Floating Point Unit 307 Most 6xx have an FPU but e300c2 core (mpc832x) don't have 308 an FPU, so when building an embedded kernel for that target 309 you can disable FPU support. 310 311 If unsure say Y. 312 313config FSL_EMB_PERFMON 314 bool "Freescale Embedded Perfmon" 315 depends on PPC_E500 || PPC_83xx 316 help 317 This is the Performance Monitor support found on the e500 core 318 and some e300 cores (c3 and c4). Select this only if your 319 core supports the Embedded Performance Monitor APU 320 321config FSL_EMB_PERF_EVENT 322 bool 323 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS 324 default y 325 326config FSL_EMB_PERF_EVENT_E500 327 bool 328 depends on FSL_EMB_PERF_EVENT && PPC_E500 329 default y 330 331config 4xx 332 bool 333 depends on 44x 334 default y 335 336config BOOKE 337 bool 338 depends on PPC_E500 || 44x 339 default y 340 341config PTE_64BIT 342 bool 343 depends on 44x || PPC_E500 || PPC_86xx 344 default y if PHYS_64BIT 345 346config PHYS_64BIT 347 bool 'Large physical address support' if PPC_E500 || PPC_86xx 348 depends on (44x || PPC_E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx 349 select PHYS_ADDR_T_64BIT 350 help 351 This option enables kernel support for larger than 32-bit physical 352 addresses. This feature may not be available on all cores. 353 354 If you have more than 3.5GB of RAM or so, you also need to enable 355 SWIOTLB under Kernel Options for this to work. The actual number 356 is platform-dependent. 357 358 If in doubt, say N here. 359 360config ALTIVEC 361 bool "AltiVec Support" 362 depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU) 363 select PPC_FPU 364 help 365 This option enables kernel support for the Altivec extensions to the 366 PowerPC processor. The kernel currently supports saving and restoring 367 altivec registers, and turning on the 'altivec enable' bit so user 368 processes can execute altivec instructions. 369 370 This option is only usefully if you have a processor that supports 371 altivec (G4, otherwise known as 74xx series), but does not have 372 any affect on a non-altivec cpu (it does, however add code to the 373 kernel). 374 375 If in doubt, say Y here. 376 377config VSX 378 bool "VSX Support" 379 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU 380 help 381 382 This option enables kernel support for the Vector Scaler extensions 383 to the PowerPC processor. The kernel currently supports saving and 384 restoring VSX registers, and turning on the 'VSX enable' bit so user 385 processes can execute VSX instructions. 386 387 This option is only useful if you have a processor that supports 388 VSX (P7 and above), but does not have any affect on a non-VSX 389 CPUs (it does, however add code to the kernel). 390 391 If in doubt, say Y here. 392 393config SPE_POSSIBLE 394 def_bool y 395 depends on PPC_E500 && !PPC_E500MC 396 397config SPE 398 bool "SPE Support" 399 depends on SPE_POSSIBLE 400 default y 401 help 402 This option enables kernel support for the Signal Processing 403 Extensions (SPE) to the PowerPC processor. The kernel currently 404 supports saving and restoring SPE registers, and turning on the 405 'spe enable' bit so user processes can execute SPE instructions. 406 407 This option is only useful if you have a processor that supports 408 SPE (e500, otherwise known as 85xx series), but does not have any 409 effect on a non-spe cpu (it does, however add code to the kernel). 410 411 If in doubt, say Y here. 412 413config PPC_64S_HASH_MMU 414 bool "Hash MMU Support" 415 depends on PPC_BOOK3S_64 416 default y 417 help 418 Enable support for the Power ISA Hash style MMU. This is implemented 419 by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The 420 OpenPOWER ISA does not mandate the hash MMU and some CPUs do not 421 implement it (e.g., Microwatt). 422 423 Note that POWER9 PowerVM platforms only support the hash 424 MMU. From POWER10 radix is also supported by PowerVM. 425 426 If you're unsure, say Y. 427 428config PPC_RADIX_MMU 429 bool "Radix MMU Support" 430 depends on PPC_BOOK3S_64 431 select ARCH_HAS_GIGANTIC_PAGE 432 default y 433 help 434 Enable support for the Power ISA 3.0 Radix style MMU. Currently this 435 is only implemented by IBM Power9 CPUs, if you don't have one of them 436 you can probably disable this. 437 438config PPC_RADIX_MMU_DEFAULT 439 bool "Default to using the Radix MMU when possible" if PPC_64S_HASH_MMU 440 depends on PPC_BOOK3S_64 441 depends on PPC_RADIX_MMU 442 default y 443 help 444 When the hardware supports the Radix MMU, default to using it unless 445 "disable_radix[=yes]" is specified on the kernel command line. 446 447 If this option is disabled, the Hash MMU will be used by default, 448 unless "disable_radix=no" is specified on the kernel command line. 449 450 If you're unsure, say Y. 451 452config PPC_RADIX_BROADCAST_TLBIE 453 bool 454 depends on PPC_RADIX_MMU 455 help 456 Power ISA v3.0 and later implementations in the Linux Compliancy Subset 457 and lower are not required to implement broadcast TLBIE instructions. 458 Platforms with CPUs that do implement TLBIE broadcast, that is, where 459 a TLB invalidation instruction performed on one CPU operates on the 460 TLBs of all CPUs in the system, should select this option. If this 461 option is selected, the disable_tlbie kernel command line option can 462 be used to cause global TLB invalidations to be done via IPIs; without 463 it, IPIs will be used unconditionally. 464 465config PPC_KERNEL_PREFIXED 466 depends on PPC_HAVE_PREFIXED_SUPPORT 467 depends on CC_HAS_PREFIXED 468 default n 469 bool "Build Kernel with Prefixed Instructions" 470 help 471 POWER10 and later CPUs support prefixed instructions, 8 byte 472 instructions that include large immediate, pc relative addressing, 473 and various floating point, vector, MMA. 474 475 This option builds the kernel with prefixed instructions, and 476 allows a pc relative addressing option to be selected. 477 478 Kernel support for prefixed instructions in applications and guests 479 is not affected by this option. 480 481config PPC_KERNEL_PCREL 482 depends on PPC_HAVE_PCREL_SUPPORT 483 depends on PPC_HAVE_PREFIXED_SUPPORT 484 depends on CC_HAS_PCREL 485 default n 486 select PPC_KERNEL_PREFIXED 487 bool "Build Kernel with PC-Relative addressing model" 488 help 489 POWER10 and later CPUs support pc relative addressing. Recent 490 compilers have support for an ELF ABI extension for a pc relative 491 ABI. 492 493 This option builds the kernel with the pc relative ABI model. 494 495config PPC_KUEP 496 bool "Kernel Userspace Execution Prevention" 497 default y 498 help 499 Enable support for Kernel Userspace Execution Prevention (KUEP) 500 501 If you're unsure, say Y. 502 503config PPC_KUAP 504 bool "Kernel Userspace Access Protection" 505 default y 506 help 507 Enable support for Kernel Userspace Access Protection (KUAP) 508 509 If you're unsure, say Y. 510 511config PPC_KUAP_DEBUG 512 bool "Extra debugging for Kernel Userspace Access Protection" 513 depends on PPC_KUAP 514 help 515 Add extra debugging for Kernel Userspace Access Protection (KUAP) 516 If you're unsure, say N. 517 518config PPC_PKEY 519 def_bool y 520 depends on PPC_BOOK3S_64 521 depends on PPC_MEM_KEYS || PPC_KUAP || PPC_KUEP 522 523 524config PPC_MMU_NOHASH 525 def_bool y 526 depends on !PPC_BOOK3S 527 528config PPC_HAVE_PMU_SUPPORT 529 bool 530 531config PPC_HAVE_PREFIXED_SUPPORT 532 bool 533 534config PPC_HAVE_PCREL_SUPPORT 535 bool 536 537config PMU_SYSFS 538 bool "Create PMU SPRs sysfs file" 539 default n 540 help 541 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*. 542 543config PPC_PERF_CTRS 544 def_bool y 545 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT 546 help 547 This enables the powerpc-specific perf_event back-end. 548 549config FORCE_SMP 550 # Allow platforms to force SMP=y by selecting this 551 bool 552 select SMP 553 554config SMP 555 depends on PPC_BOOK3S || PPC_E500 || PPC_47x 556 select GENERIC_IRQ_MIGRATION 557 bool "Symmetric multi-processing support" if !FORCE_SMP 558 help 559 This enables support for systems with more than one CPU. If you have 560 a system with only one CPU, say N. If you have a system with more 561 than one CPU, say Y. Note that the kernel does not currently 562 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors 563 since they have inadequate hardware support for multiprocessor 564 operation. 565 566 If you say N here, the kernel will run on single and multiprocessor 567 machines, but will use only one CPU of a multiprocessor machine. If 568 you say Y here, the kernel will run on single-processor machines. 569 On a single-processor machine, the kernel will run faster if you say 570 N here. 571 572 If you don't know what to do here, say N. 573 574config NR_CPUS 575 int "Maximum number of CPUs (2-8192)" if SMP 576 range 2 8192 if SMP 577 default "1" if !SMP 578 default "32" if PPC64 579 default "4" 580 581config NOT_COHERENT_CACHE 582 bool 583 depends on 44x || PPC_8xx || PPC_MPC512x || \ 584 GAMECUBE_COMMON || AMIGAONE 585 select ARCH_HAS_DMA_PREP_COHERENT 586 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 587 select ARCH_HAS_SYNC_DMA_FOR_CPU 588 select DMA_DIRECT_REMAP 589 default n if PPC_47x 590 default y 591 592config CHECK_CACHE_COHERENCY 593 bool 594 595config PPC_DOORBELL 596 bool 597 598endmenu 599 600config VDSO32 601 def_bool y 602 depends on PPC32 || COMPAT 603 help 604 This symbol controls whether we build the 32-bit VDSO. We obviously 605 want to do that if we're building a 32-bit kernel. If we're building 606 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling 607 COMPAT. 608 609choice 610 prompt "Endianness selection" 611 default CPU_BIG_ENDIAN 612 help 613 This option selects whether a big endian or little endian kernel will 614 be built. 615 616config CPU_BIG_ENDIAN 617 bool "Build big endian kernel" 618 help 619 Build a big endian kernel. 620 621 If unsure, select this option. 622 623config CPU_LITTLE_ENDIAN 624 bool "Build little endian kernel" 625 depends on PPC_BOOK3S_64 626 select PPC64_BOOT_WRAPPER 627 help 628 Build a little endian kernel. 629 630 Note that if cross compiling a little endian kernel, 631 CROSS_COMPILE must point to a toolchain capable of targeting 632 little endian powerpc. 633 634endchoice 635 636config PPC64_ELF_ABI_V1 637 def_bool PPC64 && (CPU_BIG_ENDIAN && !PPC64_BIG_ENDIAN_ELF_ABI_V2) 638 639config PPC64_ELF_ABI_V2 640 def_bool PPC64 && !PPC64_ELF_ABI_V1 641 642config PPC64_BOOT_WRAPPER 643 def_bool n 644 depends on CPU_LITTLE_ENDIAN 645